Financial Markets...
and the Instruments that Trade in Them

If the pdf file opens with missing charachters then you probably do not have the required font. To rectify this download and install
WP Math A,
WP Math B,
WP Math Extended A, and
WP Math Extended A
To install the font click on [Settings] [Control Panel] in the start menu, open the [Fonts] file and click on [Install new font] under [File]. You need to save the pdf file and open it in Acrobat to activate the math fonts.